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https://www.readbyqxmd.com/read/28545140/the-role-of-the-zinc-finger-protein-zc3h32-in-bloodstream-form-trypanosoma-brucei
#1
Cornelia Klein, Monica Terrao, Christine Clayton
Kinetoplastids rely heavily on post-transcriptional mechanisms for control of gene expression, with regulation of mRNA processing, translation and degradation by RNA-binding proteins. ZC3H32 is a cytosolic mRNA-binding protein with three non-canonical CCCH zinc finger domains. It is much more abundant in bloodstream-form Trypanosoma brucei than in procyclic forms. Tethering of ZC3H32 to a reporter mRNA suppressed translation and resulted in mRNA degradation, and deletion analysis suggested that this activity was present in both the N- and C-terminal domains, but not the central zinc finger-containing domain...
2017: PloS One
https://www.readbyqxmd.com/read/28544452/a-conserved-role-for-vegf-signaling-in-specification-of-homologous-mesenchymal-cell-types-positioned-at-spatially-distinct-developmental-addresses-in-early-development-of-sea-urchins
#2
Eric M Erkenbrack, Elizabeth Petsios
Comparative studies of early development in echinoderms are revealing the tempo and mode of alterations to developmental gene regulatory networks and to the cell types they specify. In euechinoid sea urchins, skeletogenic mesenchyme (SM) ingresses prior to gastrulation at the vegetal pole and aligns into a ring-like array with two bilateral pockets of cells, the sites where spiculogenesis will later occur. In cidaroid sea urchins, the anciently diverged sister clade to euechinoid sea urchins, a homologous SM cell type ingresses later in development, after gastrulation has commenced, and consequently at a distinct developmental address...
May 23, 2017: Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution
https://www.readbyqxmd.com/read/28544235/absence-of-juvenile-hormone-signalling-regulates-the-dynamic-expression-profiles-of-nutritional-metabolism-genes-during-diapause-preparation-in-the-cabbage-beetle-colaphellus-bowringi
#3
W Liu, Q-Q Tan, L Zhu, Y Li, F Zhu, C-L Lei, X-P Wang
Temperate insects have evolved diapause, a period of programmed developmental arrest during specific life stages, to survive unfavourable conditions. During the diapause preparation phase (DPP), diapause-destined individuals generally store large amounts of fat by regulating nutrition distribution for the energy requirement during diapause maintenance and postdiapause development. Although nutritional patterns during the DPP have been investigated at physiological and biochemical levels in many insects, it remains largely unknown how nutritional metabolism is regulated during the DPP at molecular levels...
May 20, 2017: Insect Molecular Biology
https://www.readbyqxmd.com/read/28544201/influence-of-highly-porous-electrospun-plga-pcl-nha-fibrous-scaffolds-on-the-differentiation-of-tooth-bud-cells-in-vitro
#4
Xinjie Cai, Sofie Ten Hoopen, Weibo Zhang, Charles Yi, Wanxun Yang, Fang Yang, John A Jansen, X Frank Walboomers, Pamela C Yelick
In this study, we investigated the use of three-dimensional electrospun poly(lactic-co-glycolic acid)/poly(ε-caprolactone) (PLGA/PCL) scaffolds seeded and cultured with postnatal dental cells, for improved dental tissue regeneration. Wet-electrospinning combined with ultrasonic treatment was studied as a method to enhance scaffold porosity and to promote cell-cell interactions. We also investigated whether nano-hydroxyapatite (nHA) incorporation could enhance dental cell differentiation. All scaffolds were seeded with human tooth pulp-derived dental mesenchymal (hDM) cells, or a combination of hDM and pig dental epithelial (pDE) cells, cultured for up to 28 days...
May 24, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28544142/discordant-phenotypes-in-monozygotic-twins-with-16p11-2-microdeletions-including-the-sh2b1-gene
#5
Lin Li, Linhuan Huang, Shaobin Lin, Yanmin Luo, Qun Fang
A 200∼240 kb SH2B1-containing deletion region on 16p11.2 is associated with early-onset obesity and developmental delay. Here, we describe monozygotic twin brothers with discordant clinical presentations. Intrauterine fetal growth restriction was present in both twins. Additionally, twin A exhibited coarctation of aorta, left ventricular noncompaction, atrial septal defect, pericardial effusion, left hydronephrosis, and moderate developmental delay, whereas twin B exhibited single umbilical artery. Chromosome microarray analysis was performed on both twins and their parents...
May 24, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28543436/prenatal-environmental-tobacco-smoke-exposure-increases-allergic-asthma-risk-with-methylation-changes-in-mice
#6
Sonja Christensen, Zeina Jaffar, Elizabeth Cole, Virginia Porter, Maria Ferrini, Britten Postma, Kent E Pinkerton, Mihi Yang, Yang Jee Kim, Luke Montrose, Kevan Roberts, Andrij Holian, Yoon Hee Cho
Allergic asthma remains an inadequately understood disease. In utero exposure to environmental tobacco smoke (ETS) has been identified as an environmental exposure that can increase an individual's asthma risk. To improve our understanding of asthma onset and development, we examined the effect of in utero ETS exposure on allergic disease susceptibility in an asthmatic phenotype using a house dust mite (HDM) allergen-induced murine model. Pregnant C57BL/6 mice were exposed to either filtered air or ETS during gestation, and their offspring were further exposed to HDM at 6-7 weeks old to induce allergic inflammation...
May 25, 2017: Environmental and Molecular Mutagenesis
https://www.readbyqxmd.com/read/28543358/transient-arrest-of-germinal-vesicle-breakdown-improved-in-vitro-development-potential-of-buffalo-bubalus-bubalis-oocytes
#7
Sandeep Kumar, Manish Kumar, Sunny Dholpuria, Parul Sarwalia, Vipul Batra, Sachinandan De, Rakesh Kumar, T K Datta
Germinal vesicle breakdown (GVBD) is the first milestone that an oocyte needs to achieve towards completing the maturation and gaining potential to fertilise. Significantly lower in vitro embryo production rate in buffaloes can be attributed to heterogeneity of GVBD occurrence among oocytes obtained from abattoir derived ovaries. Evidence from our earlier work had suggested that different qualities of buffalo oocytes differ significantly in their timing of GVBD. Besides, these oocytes also differ in terms of volume of Akt phosphorylation, which initiates the process of GVBD...
May 25, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28542865/disruption-of-ywhae-gene-at-17p13-3-causes-learning-disabilities-and-brain-abnormalities
#8
Abdul Noor, Simina Bogatan, Nicholas Watkins, Wendy S Meschino, Dimitri J Stavropoulos
There is a broad phenotypic spectrum of patients with 17p13.3 deletions. One of the most prominent features is lissencephaly caused by haploinsufficiency of the gene PAFAH1B1. The deletion of this gene and those distal to it, results in Miller-Dieker syndrome, however there have been many reports of patients with haploinsufficiency of the distal genes alone. The deletions of these genes including YWHAE, CRK and TUSC5 have been studied extensively and YWHAE has been postulated to be the cause of neurological abnormalities...
May 23, 2017: Clinical Genetics
https://www.readbyqxmd.com/read/28542722/a-homozygous-potentially-pathogenic-variant-in-the-paxbp1-gene-in-a-large-family-with-global-developmental-delay-and-myopathic-hypotonia
#9
Essa Alharby, Alia M Albalawi, Abdul Nasir, Sabri A Alhijji, Amer Mahmood, Khushnooda Ramzan, Firoz Abdusamad, Abdulkarim Aljohani, Osama Abdelsalam, Amr Eldardear, Sulman Basit
PAX binding protein 1 (PAXBP1) is an adaptor protein linking the transcription factor PAX3 and PAX7 to the histone methylation machinery. PAXBP1 is a nuclear protein and its high expression is known in brain cerebellar hemisphere and cerebellum. Moreover, it is also found in abundance in muscle precursor cells that are involved in myogenesis and skeletal muscles formation. Whole genome SNP genotyping and exome sequencing in a family with distinct syndrome of global developmental delay and hypotonia mapped the disease locus to the chromosome 21q22...
May 19, 2017: Clinical Genetics
https://www.readbyqxmd.com/read/28542571/quantitative-trait-loci-for-yield-and-grain-plumpness-relative-to-maturity-in-three-populations-of-barley-hordeum-vulgare-l-grown-in-a-low-rain-fall-environment
#10
Bulti Tesso Obsa, Jason Eglinton, Stewart Coventry, Timothy March, Maxime Guillaume, Thanh Phuoc Le, Matthew Hayden, Peter Langridge, Delphine Fleury
Identifying yield and grain plumpness QTL that are independent of developmental variation or phenology is of paramount importance for developing widely adapted and stable varieties through the application of marker assisted selection. The current study was designed to dissect the genetic basis of yield performance and grain plumpness in southern Australia using three doubled haploid (DH) populations developed from crosses between adapted parents that are similar in maturity and overall plant development. Three interconnected genetic populations, Commander x Fleet (CF), Commander x WI4304 (CW), and Fleet x WI4304 (FW) developed from crossing of Australian elite barley genotypes, were used to map QTL controlling yield and grain plumpness...
2017: PloS One
https://www.readbyqxmd.com/read/28542262/the-role-of-the-innate-immune-response-regulatory-gene-abcf1-in-mammalian-embryogenesis-and-development
#11
Sara M Wilcox, Hitesh Arora, Lonna Munro, Jian Xin, Franz Fenninger, Laura A Johnson, Cheryl G Pfeifer, Kyung Bok Choi, Juan Hou, Pamela A Hoodless, Wilfred A Jefferies
ABCF1 is an ABC transporter family protein that has been shown to regulate innate immune response and is a risk gene for autoimmune pancreatitis and arthritis. Unlike other members of ABC transporter family, ABCF1 lacks trans-membrane domains and is thought to function in translation initiation through an interaction with eukaryotic translation initiation factor 2 (eIF2). To study ABCF1 expression and function in development and disease, we used a single gene trap insertion in the Abcf1 gene in murine embryonic stem cells (ES cells) that allowed lineage tracing of the endogenous Abcf1 promoter by following the expression of a β-galactosidase reporter gene...
2017: PloS One
https://www.readbyqxmd.com/read/28542246/a-drastic-superoxide-dependent-oxidative-stress-is-prerequisite-for-the-down-regulation-of-irp1-insights-from-studies-on-sod1-deficient-mice-and-macrophages-treated-with-paraquat
#12
Anna Milczarek, Rafał R Starzyński, Agnieszka Styś, Aneta Jończy, Robert Staroń, Agnieszka Grzelak, Paweł Lipiński
Iron regulatory protein 1 (IRP1) is a cytosolic bifunctional [4Fe-4S] protein which exhibits aconitase activity or binds iron responsive elements (IREs) in untranslated regions of specific mRNA encoding proteins involved in cellular iron metabolism. Superoxide radical (O2.-) converts IRP1 from a [4Fe-4S] aconitase to a [3Fe-4S] "null" form possessing neither aconitase nor trans-regulatory activity. Genetic ablation of superoxide dismutase 1 (SOD1), an antioxidant enzyme that acts to reduce O2.- concentration, revealed a new O2...
2017: PloS One
https://www.readbyqxmd.com/read/28541576/rapidly-evolving-toll-3-4-genes-encode-male-specific-toll-like-receptors-in-drosophila
#13
Tera C Levin, Harmit S Malik
Animal Toll-like receptors (TLRs) have evolved through a pattern of duplication and divergence. Whereas mammalian TLRs directly recognize microbial ligands, Drosophila Tolls bind endogenous ligands downstream of both developmental and immune signaling cascades. Here, we find that most Toll genes in Drosophila evolve slowly with little gene turnover (gains/losses), consistent with their important roles in development and indirect roles in microbial recognition. In contrast, we find that the Toll-3/4 genes have experienced an unusually rapid rate of gene gains and losses, resulting in lineage-specific Toll-3/4s and vastly different gene repertoires among Drosophila species, from zero copies (e...
May 25, 2017: Molecular Biology and Evolution
https://www.readbyqxmd.com/read/28540683/genomic-regulation-of-microrna-expression-in-disease-development
#14
Feng Liu
MiroRNAs (miRNAs) are an abundant class of regulators of gene expression . Through base paring with messenger RNAs, miRNAs repress the expression levels of other genes, including those encoding transcription factors. On the other hand, the spatial and temporal patterns of miRNAs transcription are subject to regulation by transcription factors. The inter-regulation between miRNAs and TFs integrates two gene regulatory networks-at transcriptional level and post-transcriptional level to fine-tune the gene expression pattern in the development of multicellular organisms...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28540600/microglial-interferon-signaling-and-white-matter
#15
Ashley McDonough, Richard V Lee, Jonathan R Weinstein
Microglia, the resident immune cells of the CNS, are primary regulators of the neuroimmune response to injury. Type I interferons (IFNs), including the IFNαs and IFNβ, are key cytokines in the innate immune system. Their activity is implicated in the regulation of microglial function both during development and in response to neuroinflammation, ischemia, and neurodegeneration. Data from numerous studies in multiple sclerosis (MS) and stroke suggest that type I IFNs can modulate the microglial phenotype, influence the overall neuroimmune milieu, regulate phagocytosis, and affect blood-brain barrier integrity...
May 25, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28540572/characterization-and-mapping-of-dt1-locus-which-co-segregates-with-cctfl1-for-growth-habit-in-pigeonpea
#16
Rachit K Saxena, Jimmy Obala, Andrey Sinjushin, C V Sameer Kumar, K B Saxena, Rajeev K Varshney
We report growth habit profiling following SEM, genetic mapping and QTL analysis. Highlighted CcTFL1 , a candidate for determinacy in pigeonpea, since an Indel marker derived from this gene co-segregated with Dt1 locus. Pigeonpea (Cajanus cajan) is one of the most important legume crops grown in arid and semi-arid regions of the world. It is characterized with few unique features compared with other legume species, such as Lotus, Medicago, and Glycine. One of them is growth habit, an important agronomic trait...
May 24, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/28540558/an-improved-isoform-selective-assay-for-sphingosine-kinase-1-activity
#17
Melissa R Pitman, Lorena T Davies, Stuart M Pitson
Sphingosine kinases (SK) are the sole enzymes responsible for the production of sphingosine 1-phosphate (S1P). S1P is a signaling molecule with a plethora of targets, acting as both a second messenger intracellularly and extracellularly via a family of cell surface G-protein-coupled S1P receptors. The two sphingosine kinases, SK1 and SK2, arise from different genes and have some distinct and overlapping cellular functions that are regulated in part by differential cellular localization, developmental expression, and catalytic properties...
May 25, 2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28539002/from-in-vivo-to-in-vitro-the-medical-device-testing-paradigm-shift
#18
Dayna Kerecman Myers, Alan M Goldberg, Albrecht Poth, Michael F Wolf, Joseph Carraway, James McKim, Kelly P Coleman, Richard Hutchinson, Ronald Brown, Harald F Krug, Anthony Bahinski, Thomas Hartung
Amid growing efforts to advance the replacement, reduction, and refinement of the use of animals in research, there is a growing recognition that in vitro testing of medical devices can be more effective, both in terms of cost and time, and also more reliable than in vivo testing. Although the technological landscape has evolved rapidly in support of these concepts, regulatory acceptance of alternative testing methods has not kept pace. Despite the acceptance by regulators of some in vitro tests (cytotoxicity, gene toxicity, and some hemocompatibility assays), many toxicity tests still rely on animals (irritation, sensitization, acute toxicity, reproductive/developmental toxicity), even where other industrial sectors have already abandoned them...
May 25, 2017: ALTEX
https://www.readbyqxmd.com/read/28538178/wolf-hirschhorn-syndrome-candidate-1-is-necessary-for-correct-hematopoietic-and-b-cell-development
#19
Elena Campos-Sanchez, Nerea Deleyto-Seldas, Veronica Dominguez, Enrique Carrillo-de-Santa-Pau, Kiyoe Ura, Pedro P Rocha, JungHyun Kim, Arafat Aljoufi, Anna Esteve-Codina, Marc Dabad, Marta Gut, Holger Heyn, Yasufumi Kaneda, Keisuke Nimura, Jane A Skok, Maria Luisa Martinez-Frias, Cesar Cobaleda
Immunodeficiency is one of the most important causes of mortality associated with Wolf-Hirschhorn syndrome (WHS), a severe rare disease originated by a deletion in chromosome 4p. The WHS candidate 1 (WHSC1) gene has been proposed as one of the main genes responsible for many of the alterations in WHS, but its mechanism of action is still unknown. Here, we present in vivo genetic evidence showing that Whsc1 plays an important role at several points of hematopoietic development. Particularly, our results demonstrate that both differentiation and function of Whsc1-deficient B cells are impaired at several key developmental stages due to profound molecular defects affecting B cell lineage specification, commitment, fitness, and proliferation, demonstrating a causal role for WHSC1 in the immunodeficiency of WHS patients...
May 23, 2017: Cell Reports
https://www.readbyqxmd.com/read/28537559/enforcement-of-developmental-lineage-specificity-by-transcription-factor-oct1
#20
Zuolian Shen, Jinsuk Kang, Arvind Shakya, Marcin Tabaka, Elke A Jarboe, Aviv Regev, Dean Tantin
Embryonic stem cells co-express Oct4 and Oct1, a related protein with similar DNA binding specificity. To study the role of Oct1 in ESC pluripotency and transcriptional control, we constructed germline and inducible-conditional Oct1 deficient ESC lines. ESCs lacking Oct1 show normal appearance, self-renewal and growth, but manifest defects upon differentiation. They fail to form beating cardiomyocytes, generate neurons poorly, form small, poorly differentiated teratomas, and cannot generate chimeric mice. Upon RA-mediated differentiation, Oct1 deficient cells induce lineage-appropriate developmentally poised genes poorly while lineage-inappropriate genes, including extra-embryonic genes, are inappropriately expressed...
May 24, 2017: ELife
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